From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D672C32796 for ; Wed, 24 Aug 2022 16:35:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239541AbiHXQfe (ORCPT ); Wed, 24 Aug 2022 12:35:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56946 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230348AbiHXQfb (ORCPT ); Wed, 24 Aug 2022 12:35:31 -0400 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CB0EA80B63 for ; Wed, 24 Aug 2022 09:35:30 -0700 (PDT) Received: by mail-il1-f199.google.com with SMTP id o5-20020a056e02102500b002ddcc65029cso12931011ilj.8 for ; Wed, 24 Aug 2022 09:35:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc; bh=XRsedfIcW+HglbEqbIPeqE6h3oV5yzf+0kc6Op+llds=; b=LnWNZid72NLQVSB5ZZ5x10LJm9Et8StkBfWTXkYv0igcqUs7udh03ydHYx50wA5xBF RDBUmLCDOaiFabdv4FkqN5iafu33RtNJ+sVWFU24H4MvKu1jgW+7YGfutXPZoxjdUcGu HHxe2KCAUfo9fQu/dYy0OVrprgPsUoA7QIvxuT4nWnawc2mki1AZ7S1hI9LeolDW/bsT ag0zEewpvRiXU7M4ypQZyjDdmrvCefCLFqepEO5SJMmQJzJQI+ze0tmPf2Wfmrcnk5jk 9JPQHRxoDCbuWE99OzgOxjxNjJ5dZy1q/n9uzvBxQYohU7V/g+uDZD4ReA2hLt74PQJB luSA== X-Gm-Message-State: ACgBeo0Rdms+gndUhBshi/6hv39nshhuGj7EWQHPH1h95+uPKzlx7KnD 2J2y1zpR+RaN3vjeUfXyBdr4IZDzzpftKEqoyMQCX+/7Rx49 X-Google-Smtp-Source: AA6agR52F0vRGuU+pk1JcZsAkSpStS/VeWOcdJw9MHIiOCddfHTkFh2uX8a7912W44VdA1iEhOkZZByZj+LgeKjMXimkfJOgPtLF MIME-Version: 1.0 X-Received: by 2002:a92:dc0a:0:b0:2e9:4fa6:f6df with SMTP id t10-20020a92dc0a000000b002e94fa6f6dfmr2552053iln.203.1661358930205; Wed, 24 Aug 2022 09:35:30 -0700 (PDT) Date: Wed, 24 Aug 2022 09:35:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e12a9005e6ff4417@google.com> Subject: [syzbot] BUG: unable to handle kernel NULL pointer dereference in tiocsti From: syzbot To: gregkh@linuxfoundation.org, jirislaby@kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 1c23f9e627a7 Linux 6.0-rc2 git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=17eefdcb080000 kernel config: https://syzkaller.appspot.com/x/.config?x=3045c937aad027f7 dashboard link: https://syzkaller.appspot.com/bug?extid=032314e8d7de2bdb97f7 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1190eb6b080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16a1e50d080000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+032314e8d7de2bdb97f7@syzkaller.appspotmail.com Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Mem abort info: ESR = 0x0000000086000006 EC = 0x21: IABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault user pgtable: 4k pages, 48-bit VAs, pgdp=000000010b28b000 [0000000000000000] pgd=080000010b411003, p4d=080000010b411003, pud=080000010b47b003, pmd=0000000000000000 Internal error: Oops: 86000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 3028 Comm: syz-executor908 Not tainted 6.0.0-rc2-syzkaller-16440-g1c23f9e627a7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/20/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : 0x0 lr : gsmld_receive_buf+0x140/0x214 drivers/tty/n_gsm.c:2861 sp : ffff80000ffe3cb0 x29: ffff80000ffe3cc0 x28: 0000000000000000 x27: 0000000000000000 x26: 0000000000000000 x25: 0000000000000000 x24: ffff80000d937000 x23: ffff80000d681e40 x22: ffff0000cb2dc000 x21: ffff80000ffe3d21 x20: ffff80000c205988 x19: ffff80000ffe3d24 x18: 00000000000000c0 x17: ffff80000dd7a698 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000004 x12: ffff80000d681e78 x11: ff808000098e7e04 x10: 0000000000000000 x9 : ffff8000098e7e04 x8 : 0000000000000000 x7 : ffff8000098dcea4 x6 : 0000000000000000 x5 : ffff80000e087890 x4 : 0000000000000002 x3 : 0000000000000001 x2 : ffff80000ffe3d20 x1 : 0000000000000000 x0 : ffff0000cb2dc000 Call trace: 0x0 tiocsti+0x168/0x1c4 drivers/tty/tty_io.c:2293 tty_ioctl+0x284/0x9f4 drivers/tty/tty_io.c:2692 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0xd0/0x140 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 Code: bad PC value ---[ end trace 0000000000000000 ]--- --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches